CN219159171U

CN219159171U - Hydraulic pump control valve sleeve with optimized structure

Info

Publication number: CN219159171U
Application number: CN202223388610.2U
Authority: CN
Inventors: 赵阔; 官柏平
Original assignee: Sks Hydraulic Technology Co ltd
Current assignee: Sks Hydraulic Technology Co ltd
Priority date: 2022-12-17
Filing date: 2022-12-17
Publication date: 2023-06-09
Anticipated expiration: 2032-12-17

Abstract

The utility model discloses a hydraulic pump control valve sleeve with an optimized structure, which comprises a pump body with a valve cavity, wherein a pressure regulating mechanism is arranged in a cavity opening of the valve cavity of the pump body, a double-body valve sleeve is arranged in the valve cavity, the double-body valve sleeve comprises a first valve sleeve which is in sliding fit with the valve cavity and a second valve sleeve which is spirally arranged at the upper end of the first valve sleeve, and the upper end of the second valve sleeve is propped against the pressure regulating mechanism; a valve core is arranged in the first valve sleeve, and the upper end of the valve core is propped against the bottom surface of the second valve sleeve; the valve core is internally provided with a push rod hole, a push rod is arranged in the push rod hole, the upper end of the push rod is propped against the bottom of the push rod hole, and the lower end of the push rod is propped against the bottom surface of the pump body valve cavity. The utility model has the advantages of easy processing, high processing precision and convenient installation, and can effectively improve the performance of the whole pump.

Description

Hydraulic pump control valve sleeve with optimized structure

Technical Field

The utility model relates to the technical field of hydraulic pumps, in particular to a hydraulic pump control valve sleeve with an optimized structure.

Background

At present, the processing difficulty of part parts of an internal control valve of a traditional hydraulic pump is too high, and the dimensional and form and position tolerances hardly meet the drawing requirements, so that the service performance of the whole pump is continuously influenced. Therefore, the structure of the control valve sleeve of the traditional hydraulic pump is required to be optimized and improved, so that the processing difficulty of the control valve sleeve is reduced, the detection efficiency is improved, and the performance of the whole pump is improved.

Disclosure of Invention

The utility model aims to solve the technical problem of the prior art, and provides the hydraulic pump control valve sleeve with an optimized structure, which is beneficial to improving the machining precision of an inner hole and reducing the difficulty of detection and internal deburring.

The technical scheme adopted for solving the technical problems is as follows:

the hydraulic pump control valve sleeve comprises a pump body with a valve cavity formed, a pressure adjusting mechanism is arranged in a cavity opening of the valve cavity of the pump body, a double-body valve sleeve is arranged in the valve cavity, the double-body valve sleeve comprises a first valve sleeve in sliding fit with the valve cavity and a second valve sleeve spirally arranged at the upper end of the first valve sleeve, and the upper end of the second valve sleeve is propped against the pressure adjusting mechanism; a valve core is arranged in the first valve sleeve, and the upper end of the valve core is propped against the bottom surface of the second valve sleeve; the valve core is internally provided with a push rod hole, a push rod is arranged in the push rod hole, the upper end of the push rod is propped against the bottom of the push rod hole, and the lower end of the push rod is propped against the bottom surface of the pump body valve cavity.

In order to optimize the technical scheme, the specific measures adopted further comprise:

the first valve sleeve is axially and transparently formed with a valve hole, and the valve hole consists of a threaded hole with threads at the upper end and a valve core hole communicated with the threaded hole; a radial oil hole for communicating a valve core hole is formed in the peripheral surface of the first valve sleeve, and an annular oil groove is formed in the upper end of the valve core hole in an expanding mode.

An upper sealing boss for sliding sealing fit with the valve cavity is formed on the outer peripheral surface of the upper end of the first valve sleeve, a lower sealing boss for sliding sealing fit with the valve cavity is formed on the outer peripheral surface of the lower end of the first valve sleeve, and two control edges for sliding sealing fit with the valve cavity are formed on the outer peripheral surface of the middle part of the first valve sleeve; and the upper sealing boss and the lower sealing boss are respectively provided with a lubricating oil groove which plays a role in oil storage.

The control edge and the lower sealing boss are provided with a lower annular concave area, the lower annular concave area is matched with the valve cavity to form a circular gap oil duct, the radial oil hole is positioned in the lower annular concave area, and the valve cavity is internally provided with a high-pressure oil port communicated with the gap oil duct.

The second valve sleeve is spirally arranged in the threaded hole of the first valve sleeve, and the valve core is slidably arranged in the valve core hole of the first valve sleeve; the second valve sleeve is provided with external threads for being in screw fit with the threaded hole of the first valve sleeve, and a positioning step for being in positioning fit with the orifice of the threaded hole is formed on the second valve sleeve; the second valve sleeve is provided with a drain hole channel in a penetrating way in the axial direction.

The bottom surface of the valve cavity is provided with a limiting hole, and the lower end of the ejector rod is inserted into the limiting hole.

The pressure regulating mechanism consists of a regulating seat, a regulating screw, a pre-tightening spring, a spring seat and a locking nut; the adjusting seat is spirally arranged on a cavity opening of the valve cavity, the spring seat and the pre-tightening spring are arranged in a spring cavity processed by the adjusting seat, and the spring cavity of the adjusting seat is matched with the upper end of the second valve sleeve to form a low-pressure oil leakage cavity; the lower extreme roof pressure of pretension spring is in the upper end of second valve pocket, and the upper end roof pressure of this pretension spring is on the spring holder, and adjusting screw's lower extreme spiral passes the regulation screw of adjusting the seat and stretches into the spring chamber of adjusting the seat and meet with the spring holder mutually, lock nut spiral installation on adjusting screw to the bottom surface of this lock nut cooperates with the top surface roof pressure of adjusting the seat.

The upper end of the adjusting screw is spirally provided with a protective cap; the valve cavity is provided with an oil drain channel communicated with the low-pressure oil drain cavity.

Compared with the prior art, the double-body valve sleeve is arranged in the valve cavity of the pump body and is formed by assembling the first valve sleeve and the second valve sleeve, so that the machining difficulty of the traditional single-body valve sleeve can be effectively reduced, the valve hole of the first valve sleeve can be made into a through hole, the machining precision of the valve hole is improved, and the detection difficulty and the in-hole deburring difficulty are reduced. The upper end of the second valve sleeve in the double-body valve sleeve is propped against the pressure adjusting mechanism, and the working pressure of the double-body valve sleeve can be adjusted through the pressure adjusting mechanism, so that the pressure control requirement of the hydraulic pump is met.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic view of the assembly of the two-piece valve sleeve of the present utility model;

fig. 3 is a cross-sectional structural view of the first valve sleeve of the present utility model;

fig. 4 is a cross-sectional structural view of the second valve sleeve of the present utility model.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 4 are schematic structural views of the present utility model.

Wherein the reference numerals are as follows: the lubricating oil groove C, the clearance oil duct D, the high-pressure oil port K, the low-pressure oil drainage cavity X, the pump body 1, the valve cavity 1a, the limiting hole 1b, the oil drainage channel 1C, the first valve sleeve 2, the threaded hole 2a, the valve core hole 2b, the radial oil hole 2C, the annular oil groove 2D, the upper sealing boss 21, the lower sealing boss 22, the control edge 23, the annular concave area 24, the second valve sleeve 3, the oil drainage channel 3a, the external thread 31, the positioning step 32, the valve core 4, the ejector rod hole 4a, the ejector rod 5, the pressure regulating mechanism 6, the regulating seat 61, the regulating screw 62, the pre-tightening spring 63, the spring seat 64, the locking nut 65 and the protective cap 7.

The utility model discloses a hydraulic pump control valve sleeve with an optimized structure, which comprises a pump body 1 formed with a valve cavity 1 a. As shown in fig. 1, a pressure adjusting mechanism 6 is spirally installed in the cavity mouth of the valve cavity 1 a. The valve cavity 1a is provided with a double-body valve sleeve, and the double-body valve sleeve is formed by assembling a first valve sleeve 2 and a second valve sleeve 3. The traditional control valve sleeve is a single valve sleeve, the machining difficulty of the single valve sleeve is too high, the dimensional and form and position tolerance is difficult to meet the drawing requirements, and the service performance of the whole pump is easy to influence. The utility model changes the traditional single valve sleeve into the double valve sleeve, and can effectively reduce the processing difficulty of products. As shown in fig. 3, the first valve housing 2 is formed with a valve hole formed axially therethrough, and the valve hole is composed of a threaded hole 2a having a thread at an upper end thereof and a valve core hole 2b communicating with the threaded hole 2 a. The valve hole is made into the through hole, so that the machining precision of the valve hole is improved, and the detection difficulty and the difficulty of deburring in the hole are reduced. A radial oil hole 2c for communicating with the valve body hole 2b is formed in the outer peripheral surface of the first valve housing 2, and an annular oil groove 2d is formed in the valve body hole 2b by expanding the diameter of the upper end of the radial oil hole 2 c. An upper sealing boss 21 for sliding sealing fit with the inner wall of the valve cavity 1a is formed on the outer peripheral surface of the upper end of the first valve sleeve 2, a lower sealing boss 22 for sliding sealing fit with the inner wall of the valve cavity 1a is formed on the outer peripheral surface of the lower end of the first valve sleeve 2, and two control edges 23 for sliding sealing fit with the inner wall of the valve cavity 1a are also formed on the outer peripheral surface of the middle part of the first valve sleeve 2. The second valve sleeve 3 is spirally arranged at the upper end of the first valve sleeve 2, and the upper end of the second valve sleeve 3 is propped against the pressure regulating mechanism 6. The pressure adjusting mechanism 6 can adjust the pre-tightening pressure of the double-body valve sleeve in a spiral mode, and therefore the working pressure of the double-body valve sleeve meets the use requirement of the pump. A valve core 4 is arranged in the first valve sleeve 2, and the upper end of the valve core 4 is propped against the bottom surface of the second valve sleeve 3; the valve core 4 is internally provided with a push rod hole 4a, a push rod 5 is arranged in the push rod hole 4a, the upper end of the push rod 5 is propped against the bottom of the push rod hole 4a, and the lower end of the push rod 5 is propped against the bottom surface of the pump body valve cavity.

In the embodiment, in order to ensure the smoothness of the sliding of the first valve sleeve 2, the upper sealing boss 21 and the lower sealing boss 22 of the first valve sleeve 2 are both formed with a lubrication groove C for storing oil.

In the embodiment, as shown in fig. 2, a lower annular concave area 24 is formed between the lower control edge 23 and the lower sealing boss 22 in the two control edges 23, an upper annular concave area is formed between the upper control edge 23 and the upper sealing boss 21 in the two control edges 23, and a middle annular concave area is formed between the two control edges 23. The lower annular concave region 24 is matched with the valve cavity 1a to form an annular clearance oil duct D, the radial oil hole 2c is positioned in the lower annular concave region 24, and a high-pressure oil port K communicated with the clearance oil duct D is formed in the valve cavity 1 a.

In the embodiment, as shown in fig. 4, the second valve sleeve 3 is spirally installed in the threaded hole 2a of the first valve sleeve 2, and the valve core 4 is slidably disposed in the valve core hole 2b of the first valve sleeve 2; the second valve sleeve 3 is formed with an external screw thread 31 for screw-fitting with the screw hole 2a of the first valve sleeve 2, and the second valve sleeve 3 is formed with a positioning step 32 for positioning fit with the orifice of the screw hole 2 a. The second valve sleeve 3 is provided with a drain hole 3a which penetrates axially. The drain port 3a can guide out the oil leaked from the spool 4.

In the embodiment, in order to prevent the ejector rod 5 from shifting, a limiting hole 1b is further formed on the bottom surface of the valve cavity 1a, and the lower end of the ejector rod 5 is inserted into the limiting hole 1 b.

In the embodiment, the pressure adjusting mechanism 6 of the present utility model is composed of an adjusting seat 61, an adjusting screw 62, a pretensioning spring 63, a spring seat 64, and a lock nut 65. The adjusting seat 61 is provided with external threads, the adjusting seat 61 is arranged on the cavity opening of the valve cavity 1a in a spiral manner through the external threads, and a sealing ring is further pressed at the positions of the adjusting seat 61 and the cavity opening of the valve cavity 1a for preventing oil leakage. The adjusting seat 61 is also coaxially provided with an adjusting screw hole and a spring cavity, and the spring seat 64 and the pre-tightening spring 63 are both arranged in the spring cavity formed by the adjusting seat 61. The upper end of the second valve sleeve 3 stretches into the spring cavity, the spring cavity is matched with the upper end of the second valve sleeve 3 to form a low-pressure oil drainage cavity X, and the oil drainage pore canal 3a is communicated with the low-pressure oil drainage cavity X. The lower end of the pretension spring 63 is pressed against the upper end of the second valve sleeve 3, and the upper end of the pretension spring 63 is pressed against the spring seat 64. The lower end of the adjusting screw 62 is screwed through the adjusting screw hole of the adjusting seat 61 to extend into the spring cavity of the adjusting seat 61 and abuts against the top surface of the spring seat 64. A lock nut 65 is screw-mounted on the adjustment screw 62, and the bottom surface of the lock nut 65 is press-fitted with the top surface of the adjustment seat 61, locking the adjustment screw 62 to prevent loosening thereof.

In the embodiment, the upper end of the adjusting screw 62 is spirally provided with a protective cap 7. The valve chamber 1a is provided with a drain channel 1c communicating with the low-pressure drain chamber X. The protective cap 7 can prevent the adjusting screw 62 from being knocked down, and the drain passage 1c guides the leakage oil flowing into the low-pressure drain chamber X to the oil return passage.

According to the utility model, the traditional single valve sleeve is modified, and the processing difficulty of the valve sleeve is reduced by changing the single valve sleeve into the double valve sleeve, so that the valve hole of the valve sleeve can be made into a through hole, thereby improving the processing precision of the valve hole and reducing the detection difficulty and the internal deburring difficulty. The utility model has the advantages of convenient installation, time saving, work efficiency improvement and important influence on the qualification rate of the whole pump.

The preferred embodiments of this utility model have been described so far that various changes or modifications may be made by one of ordinary skill in the art without departing from the scope of this utility model.

Claims

1. The utility model provides a hydraulic pump control valve pocket of structure optimization, includes the pump body (1) of shaping has valve pocket (1 a), install pressure adjustment mechanism (6), characterized by in the accent of valve pocket (1 a): the valve cavity (1 a) is internally provided with a double-body valve sleeve, the double-body valve sleeve comprises a first valve sleeve (2) which is in sliding fit with the valve cavity (1 a) and a second valve sleeve (3) which is spirally arranged at the upper end of the first valve sleeve (2), and the upper end of the second valve sleeve (3) is propped against the pressure regulating mechanism (6); a valve core (4) is arranged in the first valve sleeve (2), and the upper end of the valve core (4) is propped against the bottom surface of the second valve sleeve (3); the valve core (4) is internally provided with a push rod hole (4 a), the push rod hole (4 a) is internally provided with a push rod (5), the upper end of the push rod (5) is propped against the bottom of the push rod hole (4 a), and the lower end of the push rod (5) is propped against the bottom surface of the pump body valve cavity.

2. The structurally optimized hydraulic pump control valve housing of claim 1, wherein: the first valve sleeve (2) is axially and transparently formed with a valve hole, and the valve hole consists of a threaded hole (2 a) with threads at the upper end and a valve core hole (2 b) communicated with the threaded hole (2 a); the peripheral surface of the first valve sleeve (2) is provided with a radial oil hole (2 c) for communicating a valve core hole (2 b), and the upper end of the valve core hole (2 b) positioned in the radial oil hole (2 c) is expanded to form an annular oil groove (2 d).

3. A structurally optimized hydraulic pump control valve housing as set forth in claim 2, wherein: an upper sealing boss (21) for sliding sealing fit with the valve cavity (1 a) is formed on the outer peripheral surface of the upper end of the first valve sleeve (2), a lower sealing boss (22) for sliding sealing fit with the valve cavity (1 a) is formed on the outer peripheral surface of the lower end of the first valve sleeve (2), and two control edges (23) for sliding sealing fit with the valve cavity (1 a) are formed on the outer peripheral surface of the middle part of the first valve sleeve (2); and the upper sealing boss (21) and the lower sealing boss (22) are respectively provided with a lubricating oil groove (C) which plays a role in oil storage.

4. A structurally optimized hydraulic pump control valve housing as set forth in claim 3, wherein: a lower annular concave area (24) is formed between the control edge (23) and the lower sealing boss (22), the lower annular concave area (24) is matched with the valve cavity (1 a) to form a circular gap oil duct (D), the radial oil hole (2 c) is positioned in the lower annular concave area (24), and a high-pressure oil port (K) communicated with the gap oil duct (D) is formed in the valve cavity (1 a).

5. The structurally optimized hydraulic pump control valve housing as set forth in claim 4, wherein: the second valve sleeve (3) is spirally arranged in the threaded hole (2 a) of the first valve sleeve (2), and the valve core (4) is slidably arranged in the valve core hole (2 b) of the first valve sleeve (2); the second valve sleeve (3) is provided with an external thread (31) for being in screw fit with the threaded hole (2 a) of the first valve sleeve (2), and the second valve sleeve (3) is provided with a positioning step (32) for being in positioning fit with the orifice of the threaded hole (2 a); the second valve sleeve (3) is axially and penetratingly provided with a drain hole channel (3 a).

6. The structurally optimized hydraulic pump control valve housing of claim 5, wherein: the bottom surface of the valve cavity (1 a) is provided with a limiting hole (1 b), and the lower end of the ejector rod (5) is inserted into the limiting hole (1 b).

7. The structurally optimized hydraulic pump control valve housing as set forth in claim 6, wherein: the pressure adjusting mechanism (6) consists of an adjusting seat (61), an adjusting screw (62), a pre-tightening spring (63), a spring seat (64) and a locking nut (65); the adjusting seat (61) is spirally arranged on an orifice of the valve cavity (1 a), the spring seat (64) and the pre-tightening spring (63) are arranged in a spring cavity processed by the adjusting seat (61), and the spring cavity of the adjusting seat (61) is matched with the upper end of the second valve sleeve (3) to form a low-pressure oil leakage cavity (X); the lower extreme roof pressure of pretension spring (63) is in the upper end of second valve pocket (3), and the upper end roof pressure of this pretension spring (63) is on spring holder (64), the lower extreme spiral of adjusting screw (62) pass in the regulation screw hole of adjusting seat (61) stretches into the spring chamber of adjusting seat (61) and is connected with spring holder (64) roof pressure, lock nut (65) spiral install on adjusting screw (62) to the bottom surface of this lock nut (65) cooperates with the top surface roof pressure of adjusting seat (61).

8. The structurally optimized hydraulic pump control valve housing as set forth in claim 7, wherein: the upper end of the adjusting screw (62) is spirally provided with a protective cap (7); the valve cavity (1 a) is provided with a drain channel (1 c) communicated with the low-pressure drain cavity (X).